2 * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
3 * Copyright (C) 2003 Red Hat
7 #include <linux/module.h>
8 #include <linux/types.h>
9 #include <linux/string.h>
10 #include <linux/kernel.h>
11 #include <linux/timer.h>
13 #include <linux/interrupt.h>
14 #include <linux/major.h>
15 #include <linux/errno.h>
16 #include <linux/genhd.h>
17 #include <linux/blkpg.h>
18 #include <linux/slab.h>
19 #include <linux/pci.h>
20 #include <linux/delay.h>
21 #include <linux/ide.h>
22 #include <linux/bitops.h>
23 #include <linux/nmi.h>
25 #include <asm/byteorder.h>
27 #include <asm/uaccess.h>
30 void SELECT_MASK(ide_drive_t *drive, int mask)
32 const struct ide_port_ops *port_ops = drive->hwif->port_ops;
34 if (port_ops && port_ops->maskproc)
35 port_ops->maskproc(drive, mask);
38 u8 ide_read_error(ide_drive_t *drive)
40 struct ide_taskfile tf;
42 drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_ERROR);
46 EXPORT_SYMBOL_GPL(ide_read_error);
48 void ide_fix_driveid(u16 *id)
50 #ifndef __LITTLE_ENDIAN
54 for (i = 0; i < 256; i++)
55 id[i] = __le16_to_cpu(id[i]);
57 # error "Please fix <asm/byteorder.h>"
63 * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
64 * removing leading/trailing blanks and compressing internal blanks.
65 * It is primarily used to tidy up the model name/number fields as
66 * returned by the ATA_CMD_ID_ATA[PI] commands.
69 void ide_fixstring(u8 *s, const int bytecount, const int byteswap)
71 u8 *p, *end = &s[bytecount & ~1]; /* bytecount must be even */
74 /* convert from big-endian to host byte order */
75 for (p = s ; p != end ; p += 2)
76 be16_to_cpus((u16 *) p);
79 /* strip leading blanks */
81 while (s != end && *s == ' ')
83 /* compress internal blanks and strip trailing blanks */
84 while (s != end && *s) {
85 if (*s++ != ' ' || (s != end && *s && *s != ' '))
88 /* wipe out trailing garbage */
92 EXPORT_SYMBOL(ide_fixstring);
95 * This routine busy-waits for the drive status to be not "busy".
96 * It then checks the status for all of the "good" bits and none
97 * of the "bad" bits, and if all is okay it returns 0. All other
98 * cases return error -- caller may then invoke ide_error().
100 * This routine should get fixed to not hog the cpu during extra long waits..
101 * That could be done by busy-waiting for the first jiffy or two, and then
102 * setting a timer to wake up at half second intervals thereafter,
103 * until timeout is achieved, before timing out.
105 static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad,
106 unsigned long timeout, u8 *rstat)
108 ide_hwif_t *hwif = drive->hwif;
109 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
114 udelay(1); /* spec allows drive 400ns to assert "BUSY" */
115 stat = tp_ops->read_status(hwif);
117 if (stat & ATA_BUSY) {
118 local_save_flags(flags);
119 local_irq_enable_in_hardirq();
121 while ((stat = tp_ops->read_status(hwif)) & ATA_BUSY) {
122 if (time_after(jiffies, timeout)) {
124 * One last read after the timeout in case
125 * heavy interrupt load made us not make any
126 * progress during the timeout..
128 stat = tp_ops->read_status(hwif);
129 if ((stat & ATA_BUSY) == 0)
132 local_irq_restore(flags);
137 local_irq_restore(flags);
140 * Allow status to settle, then read it again.
141 * A few rare drives vastly violate the 400ns spec here,
142 * so we'll wait up to 10usec for a "good" status
143 * rather than expensively fail things immediately.
144 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
146 for (i = 0; i < 10; i++) {
148 stat = tp_ops->read_status(hwif);
150 if (OK_STAT(stat, good, bad)) {
160 * In case of error returns error value after doing "*startstop = ide_error()".
161 * The caller should return the updated value of "startstop" in this case,
162 * "startstop" is unchanged when the function returns 0.
164 int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good,
165 u8 bad, unsigned long timeout)
170 /* bail early if we've exceeded max_failures */
171 if (drive->max_failures && (drive->failures > drive->max_failures)) {
172 *startstop = ide_stopped;
176 err = __ide_wait_stat(drive, good, bad, timeout, &stat);
179 char *s = (err == -EBUSY) ? "status timeout" : "status error";
180 *startstop = ide_error(drive, s, stat);
185 EXPORT_SYMBOL(ide_wait_stat);
188 * ide_in_drive_list - look for drive in black/white list
189 * @id: drive identifier
190 * @table: list to inspect
192 * Look for a drive in the blacklist and the whitelist tables
193 * Returns 1 if the drive is found in the table.
196 int ide_in_drive_list(u16 *id, const struct drive_list_entry *table)
198 for ( ; table->id_model; table++)
199 if ((!strcmp(table->id_model, (char *)&id[ATA_ID_PROD])) &&
200 (!table->id_firmware ||
201 strstr((char *)&id[ATA_ID_FW_REV], table->id_firmware)))
205 EXPORT_SYMBOL_GPL(ide_in_drive_list);
208 * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid.
209 * Some optical devices with the buggy firmwares have the same problem.
211 static const struct drive_list_entry ivb_list[] = {
212 { "QUANTUM FIREBALLlct10 05" , "A03.0900" },
213 { "TSSTcorp CDDVDW SH-S202J" , "SB00" },
214 { "TSSTcorp CDDVDW SH-S202J" , "SB01" },
215 { "TSSTcorp CDDVDW SH-S202N" , "SB00" },
216 { "TSSTcorp CDDVDW SH-S202N" , "SB01" },
217 { "TSSTcorp CDDVDW SH-S202H" , "SB00" },
218 { "TSSTcorp CDDVDW SH-S202H" , "SB01" },
219 { "SAMSUNG SP0822N" , "WA100-10" },
224 * All hosts that use the 80c ribbon must use!
225 * The name is derived from upper byte of word 93 and the 80c ribbon.
227 u8 eighty_ninty_three(ide_drive_t *drive)
229 ide_hwif_t *hwif = drive->hwif;
231 int ivb = ide_in_drive_list(id, ivb_list);
233 if (hwif->cbl == ATA_CBL_PATA40_SHORT)
237 printk(KERN_DEBUG "%s: skipping word 93 validity check\n",
240 if (ata_id_is_sata(id) && !ivb)
243 if (hwif->cbl != ATA_CBL_PATA80 && !ivb)
248 * - change master/slave IDENTIFY order
249 * - force bit13 (80c cable present) check also for !ivb devices
250 * (unless the slave device is pre-ATA3)
252 if (id[ATA_ID_HW_CONFIG] & 0x4000)
256 const char *model = (char *)&id[ATA_ID_PROD];
258 if (strstr(model, "TSSTcorp CDDVDW SH-S202")) {
260 * These ATAPI devices always report 80c cable
261 * so we have to depend on the host in this case.
263 if (hwif->cbl == ATA_CBL_PATA80)
266 /* Depend on the device side cable detection. */
267 if (id[ATA_ID_HW_CONFIG] & 0x2000)
272 if (drive->dev_flags & IDE_DFLAG_UDMA33_WARNED)
275 printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, "
276 "limiting max speed to UDMA33\n",
278 hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host");
280 drive->dev_flags |= IDE_DFLAG_UDMA33_WARNED;
285 static const char *nien_quirk_list[] = {
286 "QUANTUM FIREBALLlct08 08",
287 "QUANTUM FIREBALLP KA6.4",
288 "QUANTUM FIREBALLP KA9.1",
289 "QUANTUM FIREBALLP KX13.6",
290 "QUANTUM FIREBALLP KX20.5",
291 "QUANTUM FIREBALLP KX27.3",
292 "QUANTUM FIREBALLP LM20.4",
293 "QUANTUM FIREBALLP LM20.5",
297 void ide_check_nien_quirk_list(ide_drive_t *drive)
299 const char **list, *m = (char *)&drive->id[ATA_ID_PROD];
301 for (list = nien_quirk_list; *list != NULL; list++)
302 if (strstr(m, *list) != NULL) {
303 drive->dev_flags |= IDE_DFLAG_NIEN_QUIRK;
308 int ide_driveid_update(ide_drive_t *drive)
313 id = kmalloc(SECTOR_SIZE, GFP_ATOMIC);
317 SELECT_MASK(drive, 1);
318 rc = ide_dev_read_id(drive, ATA_CMD_ID_ATA, id);
319 SELECT_MASK(drive, 0);
324 drive->id[ATA_ID_UDMA_MODES] = id[ATA_ID_UDMA_MODES];
325 drive->id[ATA_ID_MWDMA_MODES] = id[ATA_ID_MWDMA_MODES];
326 drive->id[ATA_ID_SWDMA_MODES] = id[ATA_ID_SWDMA_MODES];
327 drive->id[ATA_ID_CFA_MODES] = id[ATA_ID_CFA_MODES];
328 /* anything more ? */
335 printk(KERN_ERR "%s: %s: bad status\n", drive->name, __func__);
340 int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
342 ide_hwif_t *hwif = drive->hwif;
343 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
344 struct ide_taskfile tf;
345 u16 *id = drive->id, i;
349 #ifdef CONFIG_BLK_DEV_IDEDMA
350 if (hwif->dma_ops) /* check if host supports DMA */
351 hwif->dma_ops->dma_host_set(drive, 0);
354 /* Skip setting PIO flow-control modes on pre-EIDE drives */
355 if ((speed & 0xf8) == XFER_PIO_0 && ata_id_has_iordy(drive->id) == 0)
359 * Don't use ide_wait_cmd here - it will
360 * attempt to set_geometry and recalibrate,
361 * but for some reason these don't work at
362 * this point (lost interrupt).
366 * FIXME: we race against the running IRQ here if
367 * this is called from non IRQ context. If we use
368 * disable_irq() we hang on the error path. Work
371 disable_irq_nosync(hwif->irq);
374 tp_ops->dev_select(drive);
375 SELECT_MASK(drive, 1);
377 tp_ops->write_devctl(hwif, ATA_NIEN | ATA_DEVCTL_OBS);
379 memset(&tf, 0, sizeof(tf));
380 tf.feature = SETFEATURES_XFER;
383 tp_ops->tf_load(drive, &tf, IDE_VALID_FEATURE | IDE_VALID_NSECT);
385 tp_ops->exec_command(hwif, ATA_CMD_SET_FEATURES);
387 if (drive->dev_flags & IDE_DFLAG_NIEN_QUIRK)
388 tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
390 error = __ide_wait_stat(drive, drive->ready_stat,
391 ATA_BUSY | ATA_DRQ | ATA_ERR,
394 SELECT_MASK(drive, 0);
396 enable_irq(hwif->irq);
399 (void) ide_dump_status(drive, "set_drive_speed_status", stat);
403 if (speed >= XFER_SW_DMA_0) {
404 id[ATA_ID_UDMA_MODES] &= ~0xFF00;
405 id[ATA_ID_MWDMA_MODES] &= ~0x0700;
406 id[ATA_ID_SWDMA_MODES] &= ~0x0700;
407 if (ata_id_is_cfa(id))
408 id[ATA_ID_CFA_MODES] &= ~0x0E00;
409 } else if (ata_id_is_cfa(id))
410 id[ATA_ID_CFA_MODES] &= ~0x01C0;
413 #ifdef CONFIG_BLK_DEV_IDEDMA
414 if (speed >= XFER_SW_DMA_0 && (drive->dev_flags & IDE_DFLAG_USING_DMA))
415 hwif->dma_ops->dma_host_set(drive, 1);
416 else if (hwif->dma_ops) /* check if host supports DMA */
417 ide_dma_off_quietly(drive);
420 if (speed >= XFER_UDMA_0) {
421 i = 1 << (speed - XFER_UDMA_0);
422 id[ATA_ID_UDMA_MODES] |= (i << 8 | i);
423 } else if (ata_id_is_cfa(id) && speed >= XFER_MW_DMA_3) {
424 i = speed - XFER_MW_DMA_2;
425 id[ATA_ID_CFA_MODES] |= i << 9;
426 } else if (speed >= XFER_MW_DMA_0) {
427 i = 1 << (speed - XFER_MW_DMA_0);
428 id[ATA_ID_MWDMA_MODES] |= (i << 8 | i);
429 } else if (speed >= XFER_SW_DMA_0) {
430 i = 1 << (speed - XFER_SW_DMA_0);
431 id[ATA_ID_SWDMA_MODES] |= (i << 8 | i);
432 } else if (ata_id_is_cfa(id) && speed >= XFER_PIO_5) {
433 i = speed - XFER_PIO_4;
434 id[ATA_ID_CFA_MODES] |= i << 6;
437 if (!drive->init_speed)
438 drive->init_speed = speed;
439 drive->current_speed = speed;
444 * This should get invoked any time we exit the driver to
445 * wait for an interrupt response from a drive. handler() points
446 * at the appropriate code to handle the next interrupt, and a
447 * timer is started to prevent us from waiting forever in case
448 * something goes wrong (see the ide_timer_expiry() handler later on).
450 * See also ide_execute_command
452 void __ide_set_handler(ide_drive_t *drive, ide_handler_t *handler,
453 unsigned int timeout)
455 ide_hwif_t *hwif = drive->hwif;
457 BUG_ON(hwif->handler);
458 hwif->handler = handler;
459 hwif->timer.expires = jiffies + timeout;
460 hwif->req_gen_timer = hwif->req_gen;
461 add_timer(&hwif->timer);
464 void ide_set_handler(ide_drive_t *drive, ide_handler_t *handler,
465 unsigned int timeout)
467 ide_hwif_t *hwif = drive->hwif;
470 spin_lock_irqsave(&hwif->lock, flags);
471 __ide_set_handler(drive, handler, timeout);
472 spin_unlock_irqrestore(&hwif->lock, flags);
474 EXPORT_SYMBOL(ide_set_handler);
477 * ide_execute_command - execute an IDE command
478 * @drive: IDE drive to issue the command against
480 * @handler: handler for next phase
481 * @timeout: timeout for command
483 * Helper function to issue an IDE command. This handles the
484 * atomicity requirements, command timing and ensures that the
485 * handler and IRQ setup do not race. All IDE command kick off
486 * should go via this function or do equivalent locking.
489 void ide_execute_command(ide_drive_t *drive, struct ide_cmd *cmd,
490 ide_handler_t *handler, unsigned timeout)
492 ide_hwif_t *hwif = drive->hwif;
495 spin_lock_irqsave(&hwif->lock, flags);
496 if ((cmd->protocol != ATAPI_PROT_DMA &&
497 cmd->protocol != ATAPI_PROT_PIO) ||
498 (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT))
499 __ide_set_handler(drive, handler, timeout);
500 hwif->tp_ops->exec_command(hwif, cmd->tf.command);
502 * Drive takes 400nS to respond, we must avoid the IRQ being
503 * serviced before that.
505 * FIXME: we could skip this delay with care on non shared devices
508 spin_unlock_irqrestore(&hwif->lock, flags);
512 * ide_wait_not_busy() waits for the currently selected device on the hwif
513 * to report a non-busy status, see comments in ide_probe_port().
515 int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout)
521 * Turn this into a schedule() sleep once I'm sure
522 * about locking issues (2.5 work ?).
525 stat = hwif->tp_ops->read_status(hwif);
526 if ((stat & ATA_BUSY) == 0)
529 * Assume a value of 0xff means nothing is connected to
530 * the interface and it doesn't implement the pull-down
535 touch_softlockup_watchdog();
536 touch_nmi_watchdog();